Cryptographic Algorithm

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A Cryptographic Algorithm is a data processing algorithm that can be implemented by a cryptographic system to solve a cryptographic task (that encrypts plaintext and/or decrypts ciphertext).



  • (Wikipedia, 2023) ⇒ Retrieved:2023-11-27.
    • A cryptographic algorithm is a method in cryptography for performing encryption or decryption—a series of well-defined steps that can be followed as a procedure. An algorithm should be contrasted with a cipher, which is a method for transforming plaintext information into ciphertext, the unreadable form. A cryptographic algorithm works in



In cryptography, we start with the unencrypted data, referred to as plaintext. Plaintext is encrypted into ciphertext, which will in turn (usually) be decrypted back into usable plaintext. The encryption and decryption is based upon the type of cryptography scheme being employed and some form of key. For those who like formulas, this process is sometimes written as:

$C = E_k(P)$

$P = D_k(C)$

where $P$ = plaintext, $C$ = ciphertext, $E$ = the encryption method, $D$ = the decryption method, and $k$ = the key.


Figure 1: Three types of cryptography: secret key, public key, and hash function.